Well, I have to oppose to BigMe. I got video banned because of views. I had one older video which I wanted to boost, bought some views, that raised a flag and it was gone. Same goes if you are using blog comments for backlinking, especially not an AA list, scrapebox/GSA, etc. This way you can annoy site owners which in return flag your video. That happened to me as well.

So, it was flagging that got your account banned, not the actual backlinks. But seriously, losing one account isn't a big deal(unless you are a newbie and/or have a lot of videos on it, which you shouldn't do), so just move on

Actually in the past two days I got two videos banned because of buying views. I've contacted the seller to see what to do about this.
This is the email I got. Once seller responds then I plan to do some testing with some random videos and see if they will get banned.

Regarding your account: xxxxxxx
This following video was found in Violation of TOU #4 Section H:
xxxxxxx
http://www.youtube.com/t/terms
"You agree not to use or launch any automated system, including without limitation, "robots," "spiders," or "offline readers," that accesses the Service in a manner that sends more request messages to the YouTube servers in a given period of time than a human can reasonably produce in the same period by using a conventional on-line web browser. Notwithstanding the foregoing, YouTube grants the operators of public search engines permission to use spiders to copy materials from the site for the sole purpose of and solely to the extent necessary for creating publicly available searchable indices of the materials, but not caches or archives of such materials. YouTube reserves the right to revoke these exceptions either generally or in specific cases. You agree not to collect or harvest any personally identifiable information, including account names, from the Service, nor to use the communication systems provided by the Service (e.g., comments, email) for any commercial solicitation purposes. You agree not to solicit, for commercial purposes, any users of the Service with respect to their Content."
Violation of the policy above has resulted in the removal and reupload of your video(s). Additional account violations of Terms of Use #4 Section H will result in account suspension. Many users trust outside marketers who claim to increase views, subscribers, likes, etc., but each user is ultimately responsible for the activity on his or her account, as well as for knowing and abiding by YouTube's Terms of Use. This includes understanding the nature of the traffic on his or her channel and making sure any hired service providers comply with YouTube's Terms of Use.
For more information about how to appeal the video(s) removal, visit his page in the Help Center:
https://support.google.com/youtube/contact/tou_removal_appeal
Please note that deleting the video(s) will not resolve the Terms of Use violation and it will prevent YouTube from reinstating the video(s), even if the appeal(s) would otherwise have been successful. You may also reupload the removed video(s) providing you do not violate YouTube's Terms of Use.
As a courtesy, we have reuploaded your video(s) here:
xxxxxxx
Please note that the video exists at a new URL. Please also note that all previous views, likes, and comments have been removed.
Sincerely,
The YouTube Team

I am also providing view over thousand of clients never got any trouble for views.
Only few are got their video removed not for view nor for social signals we given, they broken terms and service of Youtube Spam promotion

Actually in the past two days I got two videos banned because of buying views. I've contacted the seller to see what to do about this.
This is the email I got. Once seller responds then I plan to do some testing with some random videos and see if they will get banned.

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